Alex, I have done quite a lot of research on this, and for a second battery set-up I have gone with a lead-crystal - as Tinus suggests. Tests I have done have showed that this is a superior battery and far better than other deepcycle batts. Only problem is price - probably 50% more than other deepcycles. But ultimately the extra cycles and life you should get will be double any other battery in my view - see this on youtube :https://www.youtube.com/watch?v=B74IvpUlQ0Y
There are a couple of videos - guy who made these did exhastive test on lead acid and lead crystal, and the results are impressive.

I bought one of these silver batteries at Midas in 2004 -- and had to replace it last month .. and as most you know - I am off into Bundu on Outreaches about 6 times per year [some more, some less] And it powered the 55 litre WAECO and evenings the Jesus film [DVD player / Data Projector + Sound system] and the odd light And all that through the inverter.

Now have a "generic" VARTA [other name, same factory ] @R1200 .. OH .. it is 115 A H

Don't bring God down to your level of faith ... bring your faith up to His level!

Kagiso II wrote:I bought one of these silver batteries at Midas in 2004 -- and had to replace it last month .. and as most you know - I am off into Bundu on Outreaches about 6 times per year [some more, some less] And it powered the 55 litre WAECO and evenings the Jesus film [DVD player / Data Projector + Sound system] and the odd light And all that through the inverter.

Now have a "generic" VARTA [other name, same factory ] @R1200 .. OH .. it is 115 A H

Hulle het jou gevan Oupa Mac- we see that alot in our industry and it is horse

Kagiso II wrote:I bought one of these silver batteries at Midas in 2004 -- and had to replace it last month .. and as most you know - I am off into Bundu on Outreaches about 6 times per year [some more, some less] And it powered the 55 litre WAECO and evenings the Jesus film [DVD player / Data Projector + Sound system] and the odd light And all that through the inverter.

Now have a "generic" VARTA [other name, same factory ] @R1200 .. OH .. it is 115 A H

Hulle het jou gevan Oupa Mac- we see that alot in our industry and it is horse